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It's over a year since Democratic candidates joined the race to take on Donald Trump – we've now reached Super Tuesday, the day when the most states hold a Presidental primary election.

Fourteen states will now decide on which candidate they want to run against Donald Trump in November's election. Bernie Sanders is the frontrunner – but could it all be about to change?

The Nine's Chief News Correspondent has been in Los Angeles, finding out what issues are the most important as voters go to the polls.